BONE CREEP-FATIGUE DAMAGE ACCUMULATION
BONE CREEP-FATIGUE DAMAGE ACCUMULATION
复制标题
DOI：
10.1016/0021-9290(89)90013-4
复制
发表时间：
1989-01-01
影响因子：
2.4
通讯作者：
CARTER, DR
中科院分区：
文献类型：
--
作者：
CALER, WE;CARTER, DR
对人股骨皮质骨进行蠕变和疲劳试验，并将结果与骨折的累积损伤模型进行比较。在2 Hz和0.02 Hz下进行拉伸、压缩和反向加载（拉伸平均应力）的疲劳试验。载荷频率对失效循环次数有很大影响，但不影响失效总时间。骨在拉伸和压缩时表现出较差的蠕变断裂特性。拉伸蠕变试样的断裂面与压缩试样的断裂面明显不同。结果表明，拉伸循环加载主要产生时间依赖性损伤，压缩循环加载主要产生循环依赖性损伤。然而，包括拉伸和压缩载荷的载荷历史的数据表明，比由时间依赖性和周期依赖性损伤的简单总和预测的更低的失效。
Creep and fatigue tests were performed on human femoral cortical bone and the results were compared to a cumulative damage model for bone fracture. Fatigue tests in tension, compression, and reversed loading with a tensile mean stress were conducted at 2 Hz and 0.02 Hz. Load frequency had a strong influence on the number of cycles to failure but did not influence the total time to failure. Bone displayed poor creep-fracture properties in both tension and compression. The fracture surfaces of the tensile creep specimens are distinctly different than those of the compressive specimens. The results suggest that tensile cyclic loading creates primarily time-dependent damage and compressive cyclic loading creates primarily cycle-dependent damage. However, data for load histories involving both tensile and compressive loading indicate lower to failure than predicted by a simple summation of time-dependent and cycle-dependent damage.